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hw/nvme: fix buffer overrun in nvme_changed_nslist (CVE-2021-3947)

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Fix missing offset verification.

Cc: qemu-stable@nongnu.org
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Reported-by: Qiuhao Li <Qiuhao.Li@outlook.com>
Fixes: f432fdfa12 ("support changed namespace asynchronous event")
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Klaus Jensen 2021-11-17 14:12:56 +01:00
parent 916b0f0b52
commit e2c57529c9
1 changed files with 5 additions and 0 deletions
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5
hw/nvme/ctrl.c
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@ -4168,6 +4168,11 @@ static uint16_t nvme_changed_nslist(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
int i = 0;
uint32_t nsid;
if (off >= sizeof(nslist)) {
trace_pci_nvme_err_invalid_log_page_offset(off, sizeof(nslist));
return NVME_INVALID_FIELD | NVME_DNR;
}
memset(nslist, 0x0, sizeof(nslist));
trans_len = MIN(sizeof(nslist) - off, buf_len);